Dry-kiln.



J. S. BURCH.

DRY KILN.

APPLIOATION FILED Dnc. 21, 1912.

1,095,187. Patented May 5, 1914.

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J. s. BURG'H. DRY MLN.

APPLICATION FILED DBO. 21, 1912.

1,095,187. y Patented May 5, 1914.

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- painted and varnishedwand which f requirethrough the upper portion of the kiln onf To all whom t may concern.'

' State off Illinois, have invented certain new fwhich I do -declare the following te be'a` full, clear, Vand exact description, reference The invention consists in the features of ldetail view in section throughsome ofthe UNITED sTATEs PATENT formen.

JOI-IN S. BURCI-I, OF CHICAGO, ILLINOIS, ASSIGNOR TO CHICAGO VARNISI-I COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION.

DRY-KILN.

Specification of` Letters Patent.

Patented May 5, 1914.

vApplication led December 21, 1912.- Serial No. l738,090.

Be it known that I, JOHN S. BURcI-r, al citizen of the United States, and `a resident of th-e city of Chicago, county of Cook, and

and useful Improvements in Dry-Kilns, of;

being had to the accompanying drawings, forming part of this specification. 1Aflhe'present invention, while susceptible of wider application, has-relation more especially to that class of dry-kilns intended` for drying articles such as piano cases, carriage bodies, or the like', that havev been to be carefully and uniformly dried.

improvement hereinafter described,- illustrated inthe accompanying drawings and particularly pointedfout in thel claims at.` the end of this specication. Figure 1 is a view in vertical cross section through a Vdrying kiln embodying my invention. Fig. 2 is` anl enlarged detail view through the llower portion of the kiln at one side. Fig. 3 is a view in horizontal section` on line 3-3 of Fig. 1' (showing a part only 1 of they kiln), portionsbeing broken away to illustrate-subjacent parts. Fig. 4 isa view line t-c of Fig. 1. Fig. 5 is an enlarged airtinlet ports adjacent the bottom of the kiln.

The main structure of my improvedkilnV comprises a drying chamber 10, the outer walls of which may be formed of two thicknesses with an air space between them. Above the bottom 11 of thekilnare ar-` ranged the usual heating pipes 12 that maybe conveniently,supported upon rods 13 extending transversely of the kiln and resting upon suitable stringers 14; Upon the bottom 11 of the kiln7 at each side thereof, extend the stringers 15 through which are preferably formed the air induction ports to be presently described. Abovethe heating coils 12 extend metal plates 16 provided at intervals with perforations 17. Above the perforated plates or floor 16 extends a reticulated or vforaminous sheet 18 consisting. preferably of a wire mesh that may be sup-,4

'- tported upon rods 19 that are shown as resting on blocks 2() arranged at convenient vintervals. Above the wire sheet 18 is arranged the upper member of the floor that -are riveted to the upper flanges of the T- 'bars `24, so :that'the plates provide a floor with a smooth surface over lwhich trucks containing-the articles to be dried lmay be moved without any severe jarring of such articles.

By reference to Fig. 3 of the drawings it will be seen that the upper and lower floor plates 16 and 22 havel their perforations arranged *out of vertical line, the purpose of this being to break up the air currents and effect a uniform distribution of the heated air as lit rises through the floor of the kiln .and for this reason also it is preferred to employ the wire fabricbetween the upper and lower perforated plates. As shown, the upper' plates 22 are preferably provided with-smaller and more numerous perfora- .tions than the plates 16, as by this arrangement the airis more uniformly distributed and the disadvantage of having large per- `forations in the upper plate is avoided.

Through the stringers 15 at the sides of the kiln are formed a number of inlet ports 30 (see Fig. 5) extending, preferably, from end to end of the kiln at'each side thereof, and at suitable distances apart. These inlet ports 30 open, as shown, beneath the floor of the kiln and the flow of air through theseinlet ports is regulated by a sliding perforated valve or plate 32 that is guided by the upper and low-er overlapping guide plates 33 and 311, (see Fig. 2). To this sliding plate orvalve 32 is attached an operating rod 36 that extends through a slot formed inthe Stringer l5 to a point'outside the wall of the kiln, so that the -attendant by shifting the rod 36 laterally can move the valve 32 so as to regulate the flow of air through the inlet ports 30. The top of the Vkiln is also ipreferably formed of double thicknesses, as shown, suitable stringers 40 being placed between the thicknesses of the top. Through the top of the kiln are formed outlet ports 42 that preferably extend through the stringers 40. These outlet ports 42 are preferably controlled by a sliding, perforated valve or plate 43 similar to the valve 32 before described. Each of these valves 43 (one or more may be employed), is shown as supported and guided by overlapping guide plates 44 and 45 arranged upon the under face of the inner thickness of the topof the kiln. Each valve 43 has connected thereto a rod 46 that extends through the top of the kiln and, preferably, each of the rods 46 is bent, as shown in Fig. 4, and extended to one side of the kiln, the outer end of the rod 46 being pivotally connected to a hand lever 47 that is pivoted to a bracket 43 attached to the side of the kiln. By means of the hand lever 4T and rod 46, the valve 43 can be conveniently shifted so as to regulate the extent of opening of the outlet ports 42. By arranging the valves 32 and 43 within the kiln, the danger of these valves being tampered with is avoided.

From the foregoing description it will be seen that by means of the valves 32 and 43 the volume and flow of air through the body of the kiln can be accurately regulated. It will be seen also that as the air enters beneath the floor of the kiln, it will be heated and will be delivered into the body of the kiln uniformly and in very fine streams, so that no part of the kiln will be subjected to excessive drafts and a uniform distribution of the heat throughout the body of the kiln will thus be insured.

Preferably, there is placed in the top of the kiln a series of pipes or coils 50 for the passage of cold water or other chilling fluid. These pipes are supported upon suitable brackets 5l and beneath these pipes there is suspended by brackets 52 a drip pan 53 adapted to receive the water of condensation. From the-bottom of the drip pan 53 leads a discharge pipe 54 that will be extended outside the wall of the kiln. It willbe understood, of course, that the pipes 50 will be provided with a cock (not shown) whereby the cold liquid through the pipes may be admitted or regulated as desired. Preferably, the inner wall of the kiln is faced with a sheet metal lining, although this is not essential to my invention.

It will be understood that the precise details of construction above set out may be varied without departing from the spirit of the invention, and that features of the invention may b-e employed without its adoption as an entirety.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. A dry kiln comprising a drying chamber having air inlets and outlets at its bottom and top, heating pipes adjacent the bottom of said chamber and a floor above said heating pipes comprising upper and lower perforated plates, the perforations of said plates being arranged out of alinement.

2. A dry kiln comprising a drying chamber having air inlets and outlets at its bottom and top, heating pipes adjacent the bottem of said chamber and a floor above said heating pipes comprising perforated metal plates laid together with their edges abutting and supports extending below said plates to which the abutting edges of said plates are secured.

A dry kiln comprising a drying chamber having air inlets and outlets at its bottom and top, heating pipes adjacent the bottom of said chamber and a floor above said heating pipes comprising upper and lower perforated plates, and a reticulated fabric interposed between said upper and lower plates.

4. A dry kiln comprising a drying chamber, a series of heating pipes at the bottom of said chamber, a perforated floor above said pipes, a series of inlet ports in the sides of said chamber below said floor, a series of outlet ports at the upper portion of said chamber, perforated slide valves at the inner ends of said inlet and outlet ports, guides for said valves fixed to the inner surfaces of the walls of said chamber and shifter rods connected to said valves and extending outside of said chamber, substantially as described.

5. A dry kiln comprising a drying chamber having air inlets at its lower portion and air outlets at its upper portion, means for controlling the flow of air through said inlets and said outlets, means for heating the air admitted to the chamber through said inlets, and means for uniformly distributing the heated air throughout said chamber comprising a floor formed of upper and lower perforated plates, the perforations of said plates being arranged out of alinement.

6. A dry kiln comprising a drying chamber having air inlets and outlets at its bottom and top, heating pipes within said chamber, a slide valve arranged within said chamber for controlling the air outlets at its top, a rod extending from said slide valve to a point outside said chamber and a pivoted hand lever connected to Said rod.

JOHN S. BURCH.

Witnesses ELEANOR HAGENON, KATHARINE GERLACH.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

